On 27 May 2021, at 14:18, Steven D'Aprano email@example.com wrote:
On Thu, May 27, 2021 at 07:56:16AM -0000, Shreyan Avigyan wrote:
Lot of programming languages have something known as static variable storage in *functions* not *classes*. Static variable storage means a variable limited to a function yet the data it points to persists until the end of the program.
+1 on this idea.
One common use for function defaults is to optimize function lookups to local variables instead of global or builtins:
def func(arg, len=len): # now len is a fast local lookup instead of a slow name lookup
That’s a CPython performance hack, and “static” would just introduce a different performance hack. IIRC there has been work in recent versions of CPython to reduce the need for that hack by caching values in the VM.
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